Hedge funds have a reputation for being secretive, so it is no surprise that investors are eager for a peek at what top investors are holding, MarketWatch reports.

Big investors were required to reveal their biggest first-quarter holdings this week when they filed closely tracked 13-F forms with the Securities and Exchange Commission. The forms, which are due 45 days after the end of each quarter, require investors to disclose long positions in stocks, convertible bonds and options.